There's a terrific (as in "creates terror") view inside the creation of Tattoo Assassins here, where if you scroll down the page you've got the story told from one of the programmers. It sounds pretty harsh, which means it's damn funny since it didn't happen to us. The idea that people not only created this game, but endured pain and suffering to do so is tragic.

In the fatality video, abbout five minutes in, does anybody have any idea what they were thinking when they made the bird tattoo take an acidic crap on the opponent?

Yes:

"Ugh. It's 3am, I've been working for the past 11 hours, and I need to come up with some more fatalities. Okay... a bird. It eats a guy, it claws a guy, it craps on a guy, it pecks a guy... ok, that's four right there. 200 to go..."

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Dr. Boogie: Everything is so simple when you have a rocket launcher for an arm!

It's like Mortal Kombat and Pit Fighter had a bastard, crack baby, love child! Nothing smites a vanquished foe more than excreting a self-replicating bouncing turkey plater at them from one's backside.

okay, lemme try to categorize theses.-There's the gory Fatalities;-the animalities;-the reversed animalities (turns the other player into an animal);-The nudalities;-the dressalities;-and the whatthebloodyfuckisthisalities.

On the Tattoo Assassins website that Max Radical linked to, a game tester for the game mentions the diarrhea move:

I remember that there was a very damaging move: up, right, up, right, up, right, up, right while holding block, then press punch. Your character would then turn around and fire acidic diarrhea at your opponent. If you got hit by it, say good-bye to 25% of your health.